#hbVPImage

Picture Structure. Only BPU memory is supported.

Picture channel description: take HB_VP_IMAGE_FORMAT_RGB as an example, when the number of channels is 3, the imageType is HB_VP_IMAGE_TYPE_U8C3. When the number of channels is 4, the data exists an extra memory due to alignment requirements, at this time it is necessary to specify the imageType as HB_VP_IMAGE_TYPE_U8C4 (RRR* GGG* BBB*).

• Member

  Member Name	Description
  imageFormat	Picture format.
  imageType	Picture type.
  width	The pixel width of the picture.
  height	The pixel height of the picture.
  stride	The pixel offset of the picture, expressed as a number of bytes.
  dataVirAddr	The logical address of the picture on the arm side.
  dataPhyAddr	The physical address of the picture.
  uvVirAddr	The uv data logical address when the picture format is NV12.
  uvPhyAddr	The uv data physical address when the picture format is NV12.
  uvStride	The offset of the uv data when the picture format is NV12, expressed as the number of bytes.

Offset description: stride is in the range [bytes_per_pixel * width, bytes_per_pixel * MAX_IMAGE_WIDTH] and satisfies the bytes_per_pixel alignment. The bytes_per_pixel indicate the number of bytes per pixel, the size of which depends on the picture format imageFormat, width indicates the pixel width of the picture, MAX_IMAGE_WIDTH indicates the maximum width of the picture pixels. When the picture format is NV12, uvStride ranges from [2*uv_width, MAX_IMAGE_WIDTH] and must be even. When using pyramid and gdc hardware, the values ​​of stride and uvStride should be greater than the width and meet the 16-byte alignment requirement.